How to translate a VA in Guest to PA in Host?

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Hi all,
I am trying to translate a Virtual Address in Guest OS to the Physical
Address in Host OS. Currently, I enable the VHE extension, so the Host
is in EL2. I also enable EL2 Stage-1 translation and EL1 Stage-2
translation.

In my experiment, I first get the VA in Guest OS. Then, I generate an
exception that will be caught by Host KVM, and send the value as a
parameter to the Host.
In KVM, I want to use the "AT S12E1R" for this value, but it failed.

So, does KVM implement some API of it?

Sincerely,
Wang Chenxu
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